CARDIORESPIRATORY ASSESSMENT OF 24-HOUR CRASH-DIET EFFECTS ON ALTITUDE, +GZ, AD FATIGUE TOLERANCES
Eleven male surrogates of general aviation pilots, 25-40 years old, were tested for altitude, +Gz, and fatigue tolerances with and without previous fasting for 24 h. Testing included 2 min of lower body negative pressure (LBNP) at -40 torr (equivalent to +2Gz) after 118 min at 3,810 m chamber altitude and, after returning to ground level pressure, ergometry of 50 watts (W) for 6 min. The fast had no statistically significant effect on altitude and fatigue tolerances. One subject, who tolerated 2 min of LBNP in the nonfasting condition, lost useful consciousness during this test in the fasting condition. Although the remaining 10 subjects tolerated 2 min of LBNP in both fasting and nonfasting conditions without statistically significant differences in quantitated parameters, 2 of them during fasting manifested symptoms usually associated with impending syncope. Pilots should be informed that a 24-h fast may reduce the margin for safe tolerance of > or = +2Gz flight maneuvers. (Author)
- Record URL:
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Corporate Authors:
Federal Aviation Administration
Civil Aerospace Medical Institute, P.O. Box 25082
Oklahoma City, OK United States 73125 -
Authors:
- Lategola, M T
- Lyne, P J
- Burr, M J
- Publication Date: 1981-2
Media Info
- Pagination: 23 p.
Subject/Index Terms
- TRT Terms: Acceleration (Mechanics); Air pilots; Altitude; Cardiovascular system; Fatigue (Physiological condition); Losses; Males; Respiratory system; Tolerance (Physiology); Water
- Uncontrolled Terms: Diet
- Old TRIS Terms: Acceleration tolerance; Blood chemistry; Body fluids; Tolerances physiology
- Subject Areas: Aviation; Materials; Safety and Human Factors; Society;
Filing Info
- Accession Number: 00346723
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FAA-AM-81-2
- Files: NTIS, USDOT
- Created Date: Jan 29 2003 12:00AM